1/2 c. butter
1 c. brown sugar
1/4 c. corn syrup
1/2 tbsp. salt
1/4 tsp. baking soda
1/2 tsp. vanilla
3 qts. popcorn

Melt butter in pan for 1/2 hour. Stir every 15 minutes at 250°F. Stir in brown sugar, syrup and salt. Bring to a boil. Stir constantly. Boil 5 minutes over medium heat, do not stir. Remove from heat and add soda and vanilla. Pour over popcorn and mix well.